A Clinical Survey of Orthognathic Surgery for 7 Years in the Department of Oral and Maxillofacial Surgery, Chubu Rosai Hospital

A clinical survey was performed on 252 patients who underwent orthognathic surgery at the Department of Oral and Maxillofacial Surgery, Chubu Rosai Hospital, during the 7 years from April 1, 2017 to December 31, 2023.The results were as follows.1 During the 7 years, 252 patients (74 males and 178 females) with dentofacial deformities underwent orthognathic surgery.2 The average age of the patients was 27.7 7.4 years old (16-57) .Patients in their twenties accounted for the largest number (53.6) .3 The most common diagnosis was mandibular asym-metrymandibular prognathism (25.8) , followed by mandibular prognathism (21.0) .4 The most frequently performed operation was sagittal split ramus osteotomy (SSRO) , accounting for 133 cases (52.8) , followed by the combination of Le